Mechanical compound grinding-head for grinding two cylindrical machine parts at the same time



, T. F. BERNARD. MECHANICAL COMPOUND GRINDING HEAD FOR GRINDING ,TWOCYLINDRICAL MACHINE PARTS AT' THE SAME TIME.

APPLICATION FILED APR. 1. 1920.

1,367,523. Patented Feb. 1,1921.

4 SHEETS-SHEET I.

I W! TN ESSES INVENTOR J FM fomm T. F. BERNARD.

MECHANICAL COMPOUND GRINDING HEAD FORISRINDING TWO CYLINDRICAL MACHINEPAR-IS I AT THE SAME TIME.

APPLICATION FILED APR.1. 1920.

1,367,523. Patented Feb. 1, 1921 4 SHEETSSHEET 2.

WITNESSES INVENTOR E MM M. 1% ffiwm -T. F. BERNARD. MECHANICAL COMPOUNDGRINDING HEAD FOR GRINDING TWO CYLINDRICAL MACHINE PARTS AT THE SAMETIME.

APPLICATION FILED APR. I. 1920. 1,367,523. Patented Feb. 1,1921.

4 SHEETS-SHEET 3.

WITNESSES INVENTOR T. F. BERNARD. MECHANICAL COMPOUND GRINDING HEAD FORGRINDING TWDDYLINDRICAL MACHINE PARTS AT THE SAME TIME.

APPLlCATION FILED APR. I. I920.

Patented Feb. 1, 1921.

4 SHEETS-SHEET 4.

INVENTOR W/TNESSES UNITED STATES PATENT GFFICE.

THEIS IE. BERNARD, OF DETROIT, MICHIGAN, ASSIGNOR T0 FREDERICK M.EHEI-IALT, OF DETEQIT, MICHIGAN.

DIEGHANICAL COMPOUND GRINDING-HEAD FOR GRINDING TWO GYLINDRICAL MACHINEPART$ AT THE SAT E TIME.

AppIication filed April 1, 1920.

To all to 710m it may concern Be it known that I, TI-IEIS F. BERNARD, acitizen of the United States and residing at the city of Detroit, countyof "Wayne, State of Michigan, have invented certain new and usefulImprovements in hllechanical Compound Grinding-Heads for Grinding TwoCylindrical Machine Parts at the Same Time and declare the following tobe a full clear, and exact description of the same, such as will enableothers skilled in the art to which it pertains to make and. use thesame, reference being had to the accompany ing drawings which form apart of these specifications.

The objects of my invention are to providea more rigid means for holdingand grinding two cylindrical parts at the St me time, on a singlegrinding wheel, and to have a solid and rigid adjusting frame forcarrying the upper spindle; adjustment -for varying this frame to bringthe mechanical part in contact with the surface of the grinding wheel,and to have adjustable spindles for the varying lengths of the pieces tobe ground.

It is a further object of my invention to secure simplicity inconstruction, accuracy of adjustment, and ease in operation. Theseseveral objects are secured in the preferred form by the constructionand arrangement of the parts as are more fully hereafter de scribed.

Similar parts, on all drawings are marked by the same numerals.

Figure 1, is a front view of the grmdmg head showing the generalarrangement of the supporting frame for the'double grind ing spindles,with means for adjusting same to the grinding wheel.

Fig. 2,, is the top view showing the vertical arrangement of thegrinding spindles, with the driving and adjusting parts.

Fig. 3, is an end view showing the driving gears of the double s-indles. and the adjusting frame.

Fig. at, is a sectional view -AA- as is shown on Fig. 2, showing thesecondary adjusting frame for the alinement of the upper spindle withthe lower spindle.

Fig. 5,. is a sectional view BB- as is shown on Fig. 3, showing thecomplete arrangement of the double spindles, with the Specification ofLetters Patent.

Patented Feb. 1, 1921.

Serial No. 370,437.

adjusting sleeves, racks, and means for operating same.

l I will now describe more fully, the Work- 111g parts and theconstruction thereof. rcferring to the accompanying drawings-and themarks thereon.

The compound grinding head is to be used in connection with thehorizontal table of a grinding machine and mounted thereon and securelyfastened thereto by the swivel base plates 1 and 2 \Yl'llCll are pivotedtogether at the center by pin 3, base plate 1 carrying at each end solidand permanent been ings d and 5. Mounted thereon is a solid adjustingframe 6 which is pivoted to both bearings 4L and 5 by means of thehollow sleeve collars '7 and 8 passing through the bearings and allowingthe adjusting frame 6 to rock on the pivot bearing sleeves. Theadjustable bearing 6 is held securely in place by means of a coil spring47 which. passes through the frame and fastens to the base plate 1. Alsothe drive pulley 15 is placed outside the axis of the grinding spindlesand causes an upward pressure by the belt, thus rocking the frame '8more firmly against the supporting base plates. In the center of the armof the adjustable frame 6 is a micrometer adjusting screw d8, anyturning of which will rock the frame 6 about the lower grinding spindle,giving adjustment to the secondary spindle above so as to bring the workagainst the surface of the grinding wheel. The micrometer screw 48 iskept from turning by a pressure plug 49 and a coil spring underneath theplug. At the driven end and within the sleeve bearing 8, is an.adjustable sleeve 9 and which is threaded thereto at one end andsecurely fastened by locknut 10, which provides for the horizontaladjustment of the inner sleeve 9. In side the sleeve 9 is a stationarycenter point 11. Outside of, and rotating thereon, is a driving gear19.. Gear 12 carries 'ear teeth out on the inner end thereof whicengages the teeth of the common drive gear 13, and on the outer facecarries socket holes therein forming a combined gear and face plate, formeans of driving the work mounted on the center point 11. Drive gear 13is keyed to shaft l l which is mounted in the adjust able frame 6, andis driven by the drive pulley 15 keyed thereto. The pulley 15 is drivenl O O CAD center on sleeve hearing 7. 0n t id the ad ustable Sit is arm32, which is fir'nl by means of a power belt.

I the like gear 12 ner edge and engages the teeth 0 men tlllTQ gear 13,and the oute bined gear and face pate, with means driving the workmounted on the second? grinding spindle center t center end mounted witbearing 7, is a hollou ad Sleeve carries gear teeth 0?.

i edge ano eng l oi the slidin llows permanent spindle sleeve 2. l3; l1.dis

engaging the te .1. i l is to the desirel os tion to lit the length 0the work to he held betweei points on the lower spindle anu lock block522 in place thus sleeve. Insir the sleeve 21 sliding sleeve 23 whichcarries a point 24h Sleeve also has in the edge and engage the teetllease 25. Fastened to gear 26. Any movement downward will roclr. therelease f center inner sleeve 23 with from it ie woilz, ant thus r.lcasi from betwee the center points. sleeve is a coil spring 2? whiagainst the sleeve casing causin tal pressure and holding" the againstthe worln ii and sliding therein, is t the coil spring 92?. Bid cap 29and held firmly in Mounted on the adjustahl and directly above the asecondary adjustable hear I pivoted thereto and rocks uh ut the 3 lieframe 6 by a coil spring p both arms and connected t ing 5. Also in theadjusting micrometer aojusting screw a which will rock the hearing 7 andgive an adjustment to ta upper center to bring it in true alinenieutwith t e. lower grinding spindle, thus carin i taper in the worln themieroinet. being heldin place by a ir'ict-ion ping and a coil springundern r the top of hearing 31 and mounted there is an adjustablesupporting sleeve l bottom ed ge of sleeve 86 carries gear teeth whichenthe. teeth of the loclehlock 2'22. 3y pulling the block out. itreleases the teeth in the sleeve 36 anu allows a horizontal adjustmentof the t ce r for the upper spindle to fit desired o'l worl: to he heldtor grinding. l" re' ning the block 22 to place the sleeve 36 is lockedfirmly in poi ion. ll ithin the sleeve is a sliding:

sleeve 3?, and carries within the eiu i or e are age r teeth ot 2 gear39. Co.- necteu to gear 5) i. ll). A. movement downward o'l lever ll)will rotate gt *on e sleeve 37 horizcnnlly. thus from the to the pointhollow 25 and and la, and held in against the bottom 0% the by means 4 tscrews am an ado e6. adjustment the 3? ei'lrer gear can he pulled en :15the springs, thus disenga the sleeves and allowin the sleeve to slidefreely. inside of sleeve #37 is a coil spring and presses against thesleeve shoulder;

7 ins giving it a horizontal pressire 1' ldine the center 7011113 38 inthe se Oi spindl iirinly against the work. Also within the sleeve 37 andsliding therein, is a pli :6 which supports the coil spring 45;. l7 $6is driven in the cap 29 a: d held 1n pl: by hol 7 ll do wish to confinemyself to the em a ct consrzuction as herein describe but merely givethis as 'ireitcrred form oi construction.

flar ng fully descrioen my invention heroin what I claim my iDfYO'itiOlland desire to secure by Letters Eitents is: in a compound grinding headtor h oldand grinding two cylindr cal Illflelill'le rts at the same timein combination with e h rizontal table of a grind g machine and therotatigig grinri thereon. a base fixedly at tached hlo, secondary hasesw'rele ne and can; ing I a at each end thereof a lower primal spindlemouz'lted therein, and means for "ding work thereon, solid adjustingflal'ie mounted on said hearing. and r/crg" about the same center. meansfor adjusting said trame r secondary spindle mounted on top of the at.-justable frame. and means for rotating the won: thereon.

2. In a device of the character in combination with the horizontal. 1

described table of secondary swiveled there to, a stationary bearingattached to each end of the upper base plate, a hollow sleeve bearingtherein, a solid adjusting frame pivoted on said bearings, means foradjusting said frame, a sliding adjustable sleeve witl in the sleevebearing, andv means for a horizontal adjustment oi same, a center pointmounted in the end of the sliding sleeve, means for rotating the workthereon, a sliding adjustable sleeve mounted in the top oi: theadjustable frame for the secondary spindle, means for a horizontaladjustment. of said sleeve to hold same securely in position, a centerpoint inside of said adjustable sleeve, means for rotating work thereon.

3. in a device of the character described in combination with thehorizontal table of a grinding machine and the rotating grinding wheel.thereon, of a swiveled base securely attached to the horizontal table, astationary hearing at each end of the base, a solid adjusting framepivoted to the bearings, means for adjusting said frame, a slidingadjustable sleeve spindle with a stationary center point at the drivenend. means for a horizontal adjustment oi same, a combination gear andface plate mounted on the hollow sleeve bearing and rotating thereon,and concentric with the lower adjustable sleeve and center point, meansfor driving said gear, and. means for driving the work about the centerpoint from the socket face of the gear, a secondary stationary spindlemounted in the top of the adjustable frame, a combi nation gear and faceplate rotating thereon and concentric therewith, means for driving saidgear, and means for driving the work on the stationary center point fromthe socket face of the gear.

in a device of the character ceseribed in combination with thehorizontal table 011? a grinding machine and the rotating grinding wheelthereon, of a compound swiveled base fixedly attached to the table, astationary bcarin attached to each end of the base, a hollow sleevebearing therein, a solic adjusting frame pivoted on said. bearings,means for adjusting said frame, a primary and a secondary spindlemounted therein at the driving end, a combination gear and. face platerotating on each oi said spindles, a common d7; e gear enga ing theteeth of; the combination gears an L causing the rotation thereof, adriven shaft with pulley attached for said gears and securely attachedthereto, said shaft being mounted on the outside of the adjusting frameso that the upward j ')1(5SSlllG of the drive belt will tend to reel;said frame about the center ot the lower spindle and hold the same in asolid and rigid position against the base, and means for driving saidpulley.

in a device of the character described in comliiination with thehorrzontal table of a grinding machine and the rotating grinding wheelthereon, of a compound swiveled base fixedly attached to the table, andcarrying stationary hearings at each end, a solid adjusting framepivoted thereon, means for adjusting said frame, a sliding adjustablesupport sleeve inside of the pivot hearing at the tail end, and to beextended from the bearing .ii'or the support of the tail center point,means for holding support sleeve in position. a secondary adjustablebearing mounted on top of the adjustable frame at the tail center endthereof, and pivoted about the center of the lower spindle, means foradjusting said secondary bearing, a sliding adjustable support sleevemounted in the top of the secondary bearing, and means for adjustingsaid support sleeve.

(5. in a device of the character described in combination, with thehorizontal table of a grinding machine and the rotating grinding wheelthereon, of a compound swiveled base fixedly attached to the table, witha stationary bearing attached to each end thereof, a hollow sleevebearing therein, a solid adjustable frame pivoted on said bearings,means :t'or adjusting said frame, a secondary adjusting bearing mountedon the tail end of said adjusting frame, means for the ad justment ofsaid bearing, a primary and a secondary tail spindle mounted therein, anadjustable supporting sleeve for each of said tail spindles, a lockblock to engage the teeth of each of the support sleeves thus holdingthem securely in position.

7. In a device of the character described in combination with thehorizontal table of a griniflingmachine and the rotating grinding wheelthereon, of a base fixedly attached to the table, a secondary baseswiveled thereto with a stationary bearing attached to each end thereof,a hollow sleeve bearing therein, a solid adjusting frame pivoted on.said bearings, and means for adjusting said trame, a secondaryadjustable bearing mounted. on the tail end of said adjustable framewith means for adjusting same, a supporting sleeve tor both the upperand lower tail spindles. means for adjusting and h ing' same. a hollowsliding spindle carr supporting sleeves. means for holding the spindlesin place against the work, ahollow release ,tgear engaging the teeth onthe edge or the spindle. means for rotating said gear,

a coil spring within said hollow gear to aling the tail center pointwithin each of the if fixedly attached to each end o1 the base, a

hollow sleeve hearing therein,v :1 hollow 1djustable frame pii'oted onsaid bearings, means for adjusting said fi'zune a secondary adjustablehearing mounted Ont-he tail end of said adjustable frame with n'leansfor adjustingg' same, a supporting sleeve for both the upper and lowertail spindles, a coil spring and a stationary supporting plug within thespindles to hold the center points firmly against the work, itsupporting cup for holding said plugs in position against the springs. V

In testimony whereof I, 'THBTS B1111:- Xuun sign these specifications.

THEIS if. BERNARD.

Witnesses FREDERICK M. EI-IEHALT, MYRON J. DIKEMAN.

